Rosemary Castoreno, MD
Internal Medicine Physician · San Antonio, TX
Rosemary Castoreno, MD is an internal medicine physician with a practice address in San Antonio, Texas, and NPI 1225135957, issued on Sep 17, 2006. Check the license (Texas M3966, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Rosemary Castoreno
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- M3966 TX
C168306 CA
35.138061 OH
Self-reported in NPPES; status is on the state search - Practice location
- 2551 N Interstate 35, San Antonio, TX 78208
- Phone
- (210) 333-0733
- Enumerated
- Sep 17, 2006
- Record last updated
- Feb 18, 2026
- Fax
- (210) 333-0763
- Medicaid ID
- 183531602 TX
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Verify Rosemary Castoreno in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license M3966Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
44 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 61% of claims.
Most prescribed
- Furosemide20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Rosemary Castoreno among 9,175 internal medicine physician records in Texas
Rosemary Castoreno, MD is one of 9,175 internal medicine physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2026 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
657 internal medicine physician records list a practice address in San Antonio
They are 657 of the 37,749 NPPES records with a practice address in San Antonio, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in San Antonio → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Karla Avila-Perez, MDSan Antonio, TX 782091124656442
- Matthew Cates, DO, MPHSan Antonio, TX 782071295189330
- Suzanne Davis, M.D., M.P.H.San Antonio, TX 782071790134476
- Facundo Fulgueira, M.D.San Antonio, TX 782071184042343
- Heberto Garza, M.D.San Antonio, TX 782091487656427
- Ernesto Garza, M.D.San Antonio, TX 782071376685115
- Jon Avery GoSan Antonio, TX 782071134351950
- Dina Goytia-Leos, M.D.San Antonio, TX 782091275503526
Common questions
What is Rosemary Castoreno, MD's NPI number?
Rosemary Castoreno, MD's National Provider Identifier (NPI) is 1225135957, issued on Sep 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Rosemary Castoreno, MD located?
The NPPES record lists a practice address at 2551 N Interstate 35, San Antonio, TX, 78208. Phone: (210) 333-0733. Providers update this record themselves, so call before visiting.
How can I verify Rosemary Castoreno, MD's license?
NPPES lists Texas license number M3966, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Rosemary Castoreno, MD prescribe under Medicare Part D?
In 2024, Rosemary Castoreno, MD had 44 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.